Fix faulty container tests
Fix faulty container tests

\ is *not* used to create a reference, it creates a Capture.  Which
clearly was not the intent of further tests.  Which is why they were
not succeeding.  Changed to use binding instead.

Looks like these tests were made/adapted in June 2015, so most likely
these are fossils.

Allows untodoing a few tests now.  Great!

perl6/roast